浩瀚固定污染源废气中NMHC测定甲烷毛细管柱HH-PLOT-Molecular sieve

甲烷毛细管柱：

固定相：多孔层开口管分子筛柱或其他等效毛细管柱

规格：30m*0.53mm*25um
型号：HH-PLOT-Molecular sieve

HJ 604-2017环境空气 总烃、甲烷和非甲烷总烃的测定 直接进样-气相色谱法

HJ 38-2017 固定污染源废气 总烃、甲烷和非甲烷总烃的测定 气相色谱法

HJ604-2011 环境空气 总烃的测定 气相色谱

GB-T 15263-94 环境空气 总烃的测定 气相色谱法
 

Combined with the actual situation of the monitoring of fixed pollution sources, the influencing factors of the determination of non-methane total hydrocarbons (NMHC) in the exhaust gas of pollution sources by gas chromatography are discussed. The study found that there is a difference in concentration between single standard gas and mixed standard gas when calibrating the same sample. The sampling method, the material and volume of the sampling container have a serious impact on the accuracy of the monitoring results. For this reason, it is necessary to more strictly regulate the sampling method of fixed pollution sources and increase the accuracy of the monitoring results of fixed pollution sources. At the same time, by comparing the definitions of NMHC and VOCs and existing methods, the relationship between the two and the numerical difference under the same conditions are analyzed in detail. Not inconsistent. In addition, the NMHC based on the FID response value cannot accurately and comprehensively reflect the degree of air organic pollution, and may cover up some organic pollution in the exhaust gas.

Haohan Chromatography (Shandong) Applied Technology Development Co., Ltd. uses ten-port valve, double loop sampling, double chromatographic columns to separate two gas samples, and single FID detector detection method to determine total hydrocarbons, methane and non-volatile gas in the exhaust gas of fixed pollution sources. Total hydrocarbons of methane. The data of total hydrocarbons and methane can be obtained at the same time for sample analysis, which avoids sampling errors and greatly saves analysis time. It has the characteristics of simple operation, fast method, and good reproducibility.


Methane capillary column:

Stationary phase: porous layer open-tube molecular sieve column or other equivalent capillary column

Specification: 30m*0.53mm*25um
Model: HH-PLOT-Molecular sieve


application:
HJ 604-2017 Ambient air Determination of total hydrocarbons, methane and non-methane total hydrocarbons Direct sampling-gas chromatography

HJ 38-2017 Determination of Total Hydrocarbons, Methane and Non-Methane Total Hydrocarbons in Waste Gases from Stationary Pollution Sources Gas Chromatography

HJ604-2011 Determination of Total Hydrocarbons in Ambient Air Gas Chromatography

GB-T 15263-94 Determination of Total Hydrocarbons in Ambient Air Gas Chromatography